KR102123177B1 - Method for producing portion capsule for a coffee machine - Google Patents

Abstract

According to the present invention, the capsule 1, inside of which the extract product or the extract is filled is sealed, is introduced by the perforating member of the injection device or the discharge device to introduce the extract and discharge the extract product produced inside the capsule after the extraction process. It can be perforated in a known manner. The present invention is characterized in that the capsule has a cuboid or dice shape.

Description

Method for manufacturing a capsule for a coffee machine{METHOD FOR PRODUCING PORTION CAPSULE FOR A COFFEE MACHINE}

The present invention relates to the production of extracts contained in capsules, for example, beverages from ground coffee. In particular, the present invention relates to a capsule in which a hole can be formed as a single dose pack and a method for manufacturing the same.

Extraction devices for producing beverages and the like from extracting raw materials present in a single dose pack are known, for example, as coffee or espresso machines and continue to increase in popularity. In many related systems, a single dose pack is formed as a capsule in which the extracting material is sealed, for example in an airtight manner. For extraction, the capsule has holes on two opposite surfaces. On the first side, an extract-usually hot water-is introduced. On the second side, the extracted product is discharged from the capsule. At this time, depending on the beverage to be prepared and the system, a considerable pressure of, for example, 5-20 bar may be formed inside the capsule.

These capsules should not be confused with a single pack of filter coffee opened by removing the foil and removing the cover, etc.-must meet entirely different requirements-and are not always exposed to high pressure. They are not comparable to the fragrance-sealed outer packaging of the "filter pad". In the coffee machine's brewing module (brewing module), the capsules of the type described herein are usually passed horizontally or vertically by hot brewing liquids, so as mentioned, they are subject to considerable pressure from the inside. Exposure. This also caused sealing problems; Eventually, the pressurized extract is passed directly through the capsule and into the discharge device.

Aluminum and plastics, for example polypropylene, have been known in particular as capsule materials. Aluminum capsules keep the raw materials fresh for a long time, but use considerable energy to manufacture them. Polypropylene capsules have advantages in terms of energy consumption and processing, but there are many requirements for the hole forming mechanism.

Deep drawn capsules are particularly advantageous with respect to material consumption, but always have a clear cone shape.

Both the capsules incorporating the filtering means and the capsules including the shell surrounding the extraction raw material are all available on the market, and therefore, the hole forming mechanism must be configured so that the extraction raw material from the capsule is not undesirably discharged together with the extraction product. .

An example of a capsule without integrating filtration means is disclosed, for example, in EP 1 886 942.

Commercially available capsules are generally rotationally symmetrical and contain the following three function outer collars required for proper functionality:

-The collar portion functions to seal the capsule during filling operation in that it contains an energy director for ultrasonic welding at a sufficient distance from the capsule's inner space or a sufficient surface area for thermal welding;

-The collar portion functions to fix the capsule before the brewing operation;

-The collar part is essential for sealing during the extraction operation since the extract does not flow directly through the capsule into the discharge device at all.

In the case of capsules according to the prior art, a conical shape that fits very accurately into a corresponding container in an extraction chamber (brewing chamber) may serve as an additional sealing function.

Many of the capsules on the market are shaped like cups, that is, rotationally symmetric about the axis and conical. Usually, the cover of the cup-shaped capsule has a material composition different from the actual cup forming the side and bottom surfaces. At this time, the extraction liquid is injected through the cover or bottom surface, and accordingly, the extraction product is discharged through the bottom surface or cover. Capsules of this type have been found to be successful both in terms of mechanical stability and technical manufacturing.

Particularly problematic is the vortex of the raw material extracted during the extraction process. During the extraction process, the liquid passes through the capsule at high speed. When the degree of compression of the extract raw material is limited, the extract raw material swirls considerably during the extraction process. For this reason, it has already been proposed to strongly compress the extract raw material during the capsule filling process (EP 1 886 942). However, this method is rather complicated and the pellet shape consistency of the extract raw material obtained by compression may be lost during capsule transport.

Another problem that has been much discussed with regard to single dose capsules for brewed beverages is the complex packaging that adversely affects energy balance.

An object of the present invention is to provide a capsule for extractive beverages, etc., which overcomes the disadvantages of the prior art and presents an improved solution in terms of energy balance and flexibility.

The above object is achieved by the invention defined in the claims.

The capsule of a single dose according to the present invention is of the type mentioned at the outset, and is extracted by, for example, sealing material being hermetically sealed and forming a hole in the capsule on two opposite sides. On the first side, an extract-usually hot water-is introduced. On the second side, the extracted product is discharged from the capsule. At this time, depending on the beverage and system to be prepared, the capsule must withstand a significant internal pressure, for example over 5-20 bar, in particular over 10 bar. This does not, however, preclude the use of these capsules in the extraction process of American style filter coffee using a low pressure of only 1-2 bar.

The capsule does not have a sieve member or a support member disposed therein; For example, it consists of only a capsule wall and a capsule filling part (extract raw material) having a uniform wall thickness of at least several sides.

According to one aspect of the invention, the capsule is in the form of a cube or a cuboid and does not have a protruding collar or the like.

In the present specification, a cuboid or a cube-shape describes a shape that does not deviate from a geometrically correct cuboid or cube shape to a very different degree in functionality, for example, the side connecting the floor area is the maximum based on the vertical line to the floor area. It includes a pyramidal shape with a rectangular or square bottom area inclined by a very small inclination angle α of 3° or 2° or less, preferably up to 1° or less. As mentioned, the cuboid or cube shape protrudes from the capsule base structure in the plane of the end face and does not have an outer collar provided to secure the capsule to the guide groove. However, the cuboid or cuboid-shaped capsules are formed during the manufacturing process (e.g. welding beads) and protruding laterally by, for example, up to 1.5 mm or 1 mm, 0.8 mm, 0.6 mm, particularly preferably 0.5 mm. Including the outer edges, their limited dimensions, for example, are retracted from the plane of the distal end surface without significantly degrading the functionality of the cube or cuboid shape.

The great advantage of this form is that, firstly, the extract raw material can be compressed from different sides, which is not seen in the case of cup-shaped capsules. In particular, when the extraction raw material is already filled in the capsule, the extraction raw material may be compressed by pressing two opposite side walls toward each other. Cup-shaped capsules cannot be easily compressed in a non-destructive manner. Preferably, the capsule is formed so as to be able to deform two opposing side walls (or a central position on these side walls) by an elastic force having a volume-reducing effect. This deformation means a change in state at room temperature and does not exclude permanent deformation of the plastic capsule wall at high temperature.

Second, there is an advantage in that the chargeability is significantly improved. Filled capsules can be stacked sequentially in series to obtain a stack that is substantially free of intermediate spaces, which can be stacked on top of other capsules, providing a nice appearance-for example as a cube-while minimizing outer packaging. Can be managed.

Preferably, a hole may be formed on all sides of the capsule, that is, all pairs of faces facing each other. This means that the capsule wall on the face of the cube is not only perforated by an appropriate metal tip, but also the capsule with a hole in the pair of opposing surfaces is resistant to the extraction pressure when liquid is introduced and the extract flows only at the extraction surface and perforation locations. Means

The capsule is sealed in a tight oxygen-sealed manner by a wall containing all sides, corners and vertices. Therefore, a separate foil completely or partially covering the capsule and an oxygen-sealed bag for the capsule are not required at all. Compared to known systems, the amount of waste is much less.

Preferably, all sides of the capsule are made of substantially the same material composition. In particular, all sides of the capsule may have substantially the same thickness. In other words, a special cover foil that is configured differently from the basic structure is unnecessary. “Substantially the same thickness” may mean, for example, that the thickness of different faces differs by up to 30% or less.

The cube shape is particularly advantageous. If all sides are composed of the same material composition and thickness, it does not matter how the cube-shaped capsule is loaded into the extraction module of the extraction device (such as a coffee machine). The cube shape reduces the user's fear of inaccurate manipulation.

Preferably, the capsule is made of plastic. Polypropylene (PP) is particularly preferred as the capsule material. Other materials, especially other plastics that are compatible with food, are also conceivable. The wall thickness in the construction of the plastic capsule is preferably 0.1 mm to 0.5 mm, for example 0.2 mm to 0.4 mm, in particular 0.25 mm to 0.35 mm.

When constructing a plastic capsule, the plastic sheet is preferably deformed (for example, deep-processed) to produce the capsule. In this case, it is possible to significantly reduce the amount of material required compared to other processes-for example, injection molding. The plastic sheet can contain an oxygen barrier layer in a known manner. According to the deep-processing process, the pre-deep-processed plastic capsule was always conical because a conical shape was formed. In this regard, the present invention (or an embodiment thereof) adopts a completely new method in that it selects a conical variant that has been found to be very advantageous as mentioned above. To this end, special-purpose deep processing tools developed specifically for these applications are used.

According to a preferred embodiment of the invention, the capsule is provided with a coffee machine or an extraction module of a coffee machine comprising:

-The first extraction module part and

-A second extraction module unit that can move relative to the first extraction module unit and forms an ejector for discharging the extraction product from the capsule together with the first extraction module unit and an injector that introduces the extract into the capsule, and the capsule An extraction chamber formed to fit the shape and surrounding the capsule at least partially during the extraction operation, each of the dispensing device and the injector comprising at least one perforation tip for perforating the capsule when the extraction chamber is closed,

-The extraction chamber is manufactured in accordance with the shape of the capsule described above and functions as a sealing method so that the extract liquid introduced into the capsule by the injector can pass through the capsule and reach the surface where the discharge device is located.

In other words, this method provides an extraction chamber that contains a means to receive a substantially cube-shaped capsule but instead to bring the extract under pressure through the capsule, instead of requiring an outer collar portion responsible for the sealing function.

According to another preferred embodiment, the extraction module does not have a fixing groove or the like for fixing the collar portion-not present according to the present invention-instead, the capsule is fed directly into the extraction chamber. This means, for example, that the first extraction module part forms a capsule receiving container having a contact surface and a side guide, wherein the capsule introduced through the input position is guided by the side guide and positioned on the contact surface. , The second extraction module portion can be moved relative to the first extraction module portion to seal the extraction chamber, and the contact surface and side guides are positioned to form part of the wall of the extraction chamber.

Also preferably, the extraction module comprises compression means for enhancing extraction by, for example, compressing the capsules from two sides. The compression means may include, for example, two pins that can be moved in the capsule space in the opposite direction to the spring force and moved by the guide cam while sealing the extraction chamber.

The preferred method for preparing the capsule is carried out as follows: First, a basic cube (or other basic polyhedron) having five sides and one open side is made of a suitable plastic. This plastic cube can be produced in packaging manufacturing plants and by deep processing. Next, the open basic structure is filled with extraction raw material in a filling facility. Subsequently, a cover having the same material composition and the same thickness is preferably fastened to the open side of the open base structure.

According to the first possibility, the fastening is made by, for example, ultrasonic welding, thermal welding or adhesive bonding along the outer edge of the basic structure. To this end, the basic structure is first continuous around the open surface and protrudes inward or outward and has a collar portion to which the cover is welded or glued. When fastening by ultrasonic welding, the collar portion may be provided with an energy director. In this case, the energy director differs from the known solution in that it can be arranged near the inside, rather than as far as possible. For example, the distance d between one edge of the energy director and the plane defined by the inner wall of the capsule is 0.7 mm or less, preferably 0.6 mm, 0.5 mm or 0.4 mm or less, for example 0.2 mm to 0.4 mm You can. -As desired-When the collar portion protrudes outward, the cover may be slightly larger than the open surface of the basic structure, for example, slightly protrudes to the outer edge of the collar portion. After welding, the outer edges can be at least partially separated, for example by punching, in some cases so as to be minimally deviated from the cube shape (other polyhedra suitable).

According to a second possibility, the basic structure also has an outer collar portion which first protrudes outward. The cover may be flat or-preferably-bent outward. Thereafter, the ultrasonic energy is absorbed between the ultrasonic generator and the cutting anvil so as to have a large pressure resistance by welding relatively deeply on the one hand, and on the other hand, an ultrasonic cutting and sealing process in which the protruding collar part is separated during the welding process. Use

According to the present invention, there is provided a capsule for extractive beverages, etc. that overcomes the disadvantages of the prior art and presents an improved solution in terms of energy balance and flexibility.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings. In the drawings, the same reference numerals denote the same or similar components. These drawings are not shown in a fixed ratio, but rather the components partially corresponding to each other are shown in different sizes to some extent. In the drawing:
1 is a view showing a capsule,
2 is a view showing a modification of the capsule of Figure 1,
3 is a view showing another modification of the capsule of FIG. 1,
FIG. 4 schematically shows a capsule which is almost cube-shaped and slightly pyramid,
5 shows a state in which a hole is formed on one surface of the capsule,
6 shows a state in which a hole is formed at the corner or a vertex of the capsule,
7 shows a basic structure having an auxiliary collar for manufacturing a capsule according to the present invention,
8 is a detailed view of the basic structure and the cover among the methods for manufacturing the capsule,
9 and 10 show the basic structure and cover for another method for manufacturing a capsule according to the invention;
11 shows a capsule prepared by the method according to FIGS. 9 and 10,
12 and 13 are views showing an extraction module for operation with a capsule according to the present invention.

The capsule 1 according to FIG. 1 is cube-shaped and consists of polypropylene with a wall thickness of 0.1 mm to 0.5 mm, preferably 0.2 mm to 0.4 mm, for example 0.25 mm to 0.35 mm.

The outer edge length of the cube (1.2) for each serving of coffee to suit the taste of drinking in the continent of Europe is preferably 24 to 30 mm, for example 26 to 27 mm. When the outer edge length is 27.5 mm, the maximum filling weight of the coffee is about 8.5 g. However, for example, the size of each single serving of capsule to suit the taste of coffee for Americans may have different dimensions. In the United States, the outer edge length of the capsule is, for example, 34 mm or less, for example, when the filling amount is about 14-15 g, for example, about 32 mm. For this drinking taste, the inlet pressure of the water can be selected differently, for example only about 1-2 bar, but otherwise 10-18 bar is preferred.

A generally preferred range of edge lengths is 24 mm to 34 mm.

In order to introduce the extraction liquid and discharge the extraction product, the capsule may be formed with holes on all six sides (1.1), all 12 corners (1.2) and all eight vertices (1.3). It is done at the face/edge/vertex facing each other.

In the drawing according to FIG. 2, the cube-shaped capsule may have an edge formed as a rounded edge 1.2. Furthermore, in FIG. 2, there is a collar portion 1.4, which is located on the lower surface and is continuous around the circumference and is formed in the manufacturing process to protrude slightly to the side, which will be described in more detail below. As illustrated in FIG. 3, there may be an outer reinforcement 1.6 formed together during manufacture.

The capsule 1 according to FIG. 4 is also almost cube-shaped. However, in the figure, the upper surface (1.1) is slightly larger than the lower surface, and strictly speaking from a mathematical point of view, the capsule has a pyramidal shape. In the figure, the vertical line to the floor area-naturally means a plane perpendicular to the floor area extending through the edge between the floor area and its side-the inclination angle α of the side as a reference is very small; Preferably, the maximum is 2 degrees or less, for example, only about 1 degrees. Furthermore, the height of the capsule above the bottom area almost coincides with the edge length of the bottom area, for example the difference is up to 5%.

5 shows very schematically the perforation of the side walls of the capsule with the perforation member 3. Perforated members forming holes in the capsule for introducing or discharging liquid are known and are still under development. In principle, the capsules according to the invention are suitable for all types of drilling tools developed to form holes in selected capsule materials with a selected wall thickness, i.e. certain types of capsules according to the invention are perforated compared to other types of cases. No other conditions are required for the appliance. However, a deployment structure in which a plurality of distributed perforation members are present on the injector surface, especially the extraction surface, and no perforation member is provided in the center is preferred.

6 shows a suitable arrangement for forming a hole in the capsule 1 from the edge. The arrangement structure has two perforation members that are disposed close to each other to perforate the surfaces connecting the corners so that liquid can be introduced or discharged. In addition, several pairs of perforated members may be arranged along the length of the edge, or different numbers of perforated members may be arranged on two sides adjacent to the edge. It is also conceivable to form a hole in the capsule from the vertex, in which case there are preferably at least three or more perforating members, one for each side of the capsule that is connected to the vertex.

Although an appropriate arrangement structure of the perforated member for ejection or introduction is preferably provided at the opposing face/edge/vertex, in principle, an asymmetrical placement structure (introduction through the edge, discharge through the side, etc.) is also conceivable.

The method for preparing the capsules of the type described above is related to the first possibility and is discussed below with reference to FIGS. 7 and 8. The cube-shaped structure 11 with one surface open as shown in FIG. 7 can be manufactured by, for example, thermoforming. In the figure, the side wall 11.1 adjacent to the opening located at the top is very slightly -1° from the vertical line to the side wall ('bottom') facing the opening so that the opening is slightly larger than the area of the bottom measured at the inner surface. -It is slanted. This optional feature has the effect that the cube-shaped structure can be stacked in a space-saving manner without being filled. According to the present invention, it is also possible to omit this slight inclination to obtain an exactly cube-shaped capsule: in this case, an unfilled and open cube-shaped structure can no longer be easily stacked and, for example, bulky It is advantageous to transport as a large laminate.

In the region of the opening, the outer collar portion 12 is provided outside the open cube-shaped structure and can protrude very clearly in the lateral direction. As shown in the detail view according to FIG. 8, the collar portion 12 has a peak 11.5 facing upward (in the direction of the open face) and having an upper edge (corresponding to a sharp point in the cross-sectional view).

The collar portion 12 with a peak 11.5 serves as an auxiliary portion in fastening the cover 13 by ultrasonic welding. To this end, the cover 13 is positioned as shown in FIG. 8. Subsequently, the ultrasonic generator of the ultrasonic welding machine (with respect to the orientation shown in Fig. 8) is pressed onto the cover from above and the ultrasonic vibrating portion is coupled to the cover. In this case, first, the collar portion 12 serves to apply the opposing force: Before performing ultrasonic vibration, the structure 11 filled with the extraction raw material is placed on the contact surface 15 so as to protrude through the square opening, and the cross section of the structure It is molded so as to correspond to the surface of the collar portion 12 at the edge of the opening. As a result, the structure is fixed during ultrasonic welding, and the necessary opposing force can be applied regardless of the stability of the structure 11. The peak 11.5 serves as an energy director during the ultrasonic welding process. In the region of the peak, ultrasonic energy is preferentially converted to heat, so that the material of the cover 13 and the material of the structure 11 begin to melt near the peak and weld to each other. Instead of or in addition to the peaks 11.5, the collar portion may have other structures that serve as energy directors, for example a number of tip portions.

After the ultrasonic welding process, the collar portion can be removed by punching. When the collar portion is removed, the cube shown in FIG. 3 is produced with the collar portion 1.4, which remains at a very slight extent (eg, less than or equal to 0.1 mm) at most, as shown in FIG. 2.

For this purpose-as shown in FIG. 8-as is known from the prior art, it is desirable for the energy director (here peak 11.5) to contact the punching tool during the punching-removal process outside the location where the energy director was before welding. For this reason, it is preferable that it is located on the inner surface near the inner wall of the structure 11 rather than as far as possible on the collar portion. For example, the distance d between the inner wall and the edge formed by the peaks 11.5 is 0.7 mm or less, particularly preferably up to 0.6 mm, 0.5 mm or 0.4 mm or less, for example 0.25 mm to 0.4 mm to be.

The capsule structure 11 (with a slight exaggerated shape of a slightly conical shape) which can be used for the manufacturing method according to the second possibility (with an ultrasonic cutting and sealing process) and a modification of the cover are shown in FIGS. 10, respectively. The collar portion 12 of the capsule structure and the collar portion 13.2 of the cover are sequentially placed in an anvil and then separated by an ultrasonic cutting and sealing process to obtain a cube-shaped capsule having a very small protruding welding bead. The difference from the above-described embodiment is that the capsule structure is slightly smaller in height than the width of the sidewalls, and the cover is bent outwards (in the drawing, the curvature of the inside of the cover (13.1) can be seen very well) to compensate for the insufficient cube height. do. As a result, the weld bead is retracted slightly from the upper end face, ie retracted downward.

11 shows an example of the capsule 1 produced by the ultrasonic cutting and sealing process mentioned above. For cubes of 27.5 × 27.5 × 27.5 mm, each α of 1˚ slightly different from 0˚ and size 27.5 × 27.5 × 27.5 mm, protruding laterally on all sides by up to about d = 0.35 mm, i.e. up to about 3% The outer weld bead 14 is clearly visible. As already mentioned, the weld bead is slightly retracted downward relative to the upper end face.

12 and 13 show an extraction module with a capsule 1. In an already known manner, the extraction module 103 is guided between structures having two vertical guide walls and is movable relative to each other by an actuating lever pivotable about the pivot pin 106. And injector 104. In the illustrated embodiment, the injector can be moved in position in the direction of the discharge device 103 by pivotal movement of the actuation lever, but the discharge device cannot move relative to the structure.

In FIG. 12, the input opening 107 for injecting the cube of a single dose can be clearly seen. The input opening is formed in the structure, is located in the area of the discharge device 103, and is in a stopped state during movement of the operation lever like the discharge device. The dosing opening can be pointed downward in a slightly conical shape for a centralized effect on the capsules without fear that the inclination of the capsules will become too large when introduced.

In the operating state, the extraction module is provided as a horizontal extraction module of the coffee machine, and includes a water tank, a water heating device (for example, a fluid heater) and a pump for supplying the extraction water to the injector 104 in addition to the extraction module do. An appropriate supply line 118 of the injector can be formed by a known method; The supply pipe 118 is not the subject matter of the present invention, and thus is not described in detail herein. The injector may have at least one or more hole forming tip portions 112 provided with a supply opening to form a hole in the capsule and supply an extract through the supply opening. The coffee machine has, for example, a capsule container which is disposed under the extraction chamber and in which capsules are automatically discharged by pulling up of the operating lever after the extraction operation.

The discharge device 103 is also provided with at least one perforated tip 111 and a discharge opening. According to this arrangement, there is also a discharge pipe that delivers the coffee (etc.) that appears after exiting the discharge device to flow to the cup located at the desired location.

As can be seen particularly well in FIG. 12, the discharge device 103 forms a capsule container with a contact surface 21 for the capsule injected through the dosing opening while defining the seating area 20.

When the extraction chamber is opened, the substantially cube-shaped capsule guided by the first side wall and introduced through the dosing opening will rest on the contact surface 21.

The injector has a crimping pin 32 on each of the two faces, the crimping pin does not protrude inwardly above the sidewall 115 in the seating position, but in a direction of change, the guide plate 31 protrudes beyond the sidewall into the interior and extraction space. ) And is not shown in the drawing, it is possible to move the position inwardly opposite to the spring force of the spring disposed between the collar portion 321 and the side wall 115 of the crimping pin. At the same time, the collar portion 321 also forms a stop portion for moving the pressing pin 32 radially outwardly with the guide plate 31.

13, the operation method of the pressing pin 32 is clearly shown. On the side of the extraction module, camways 42 are integrally formed on each of the two surfaces. The camway may be formed on the corresponding side wall itself or the camway member 41 fastened to the side wall as shown. The crimping pin 32 is crimped outward by the spring force against the camway 42. While the position of the injector 104 is moving from the open position to the closed position, the pressing pin 32 is directed inward, which is opposite to the spring force by the shape of the camway. As a result, the inserted capsule is compressed on two sides; It can be moved, for example, 2 to 8 mm, preferably 3.5 to 7 mm in the inner direction of the pressing pin. As a result, the coffee powder in the capsule is compacted, especially in the central region. Also, as a result, the extract flowing in the center is less resistant to the extract flowing along the circumference of the capsule.

While the extraction chamber is switched to the closed state, the capsule is also easily moved to the side where the discharge device is located, so that the two sides are formed by the hole forming tip 111 of the discharge device and the hole forming tip 112 of the injector. A hole is formed.

In addition to compressing the extracted raw material, the compression pin 32 has another function. When the extraction chamber is opened after the extraction operation, the pressing pin moves the position of the capsule downward from the capsule container to the injector surface so that it falls down to the capsule container (not shown). The process of fixing the capsule by the pressure pin 32 first reaching the inside of the extraction chamber while the injector is moving is automatically performed; In the position shown in Fig. 12, where the center of gravity of the capsule is already outside the seating area, this fixation is almost released. Depending on the filling degree of the capsule, this effect is further enhanced by the extraction raw material which tends to swell the capsule wall slightly outward, usually after the extraction operation.

In addition, it can be seen in FIG. 13 that the tip portion 112 for forming a hole on the surface of the injector is spaced at a different distance from the tip portion 111 for forming a hole on the surface of the discharge device. In the illustrated example, the tip for forming a hole on the face of the injector (the separation distance in the drawing is 19 mm) is more clearly arranged outward than the tip for forming a hole in the discharge device surface (the separation distance in the drawing is 14 mm). In general, it is preferable that the distance between the tip portions is significantly different, for example, by at least 15% or more.

The extraction chamber is formed so that during the extraction operation, the extract cannot pass through the capsule and enter the discharge device at all, and the extraction product does not flow to any place other than the discharge device.

Claims (9)

As a method for preparing a capsule for a coffee machine,
The capsule has a capsule wall and, except for the outer edge protruding in the lateral direction, has a cube or cuboid shape, the method comprising the following steps:

Manufacturing a multi-faceted basic structure having five sides and having a collar portion having a sixth side open and formed around a corner of the basic structure;

Filling the basic structure with an extract raw material or an extract;

Fastening the cover along the edge of the structure to completely surround the formed interior space;
It includes,

The cover is fastened to the basic structure by ultrasonic welding,

During the ultrasonic welding, the collar portion is partially separated from the basic structure at the same time by ultrasonic action, or the collar portion is partially separated from the basic structure following the ultrasonic welding, which is a part of the collar portion adjacent to the basic structure. The protruding outer edge remains attached to the basic structure,
In the case of the ultrasonic welding and in the case of separation of the collar portion, the basic structure is characterized in that it is located on a cutting anvil, a method for manufacturing a single dose capsule for a coffee machine. As a method for preparing a capsule for a coffee machine,
The capsule has a capsule wall and, except for the outer edge protruding in the lateral direction, has a cube or cuboid shape, the method comprising the following steps:

Manufacturing a multi-faceted basic structure having five sides and having a collar portion having a sixth side open and formed around a corner of the basic structure;

Filling the basic structure with an extract raw material or an extract;

Fastening the cover along the edge of the structure to completely surround the formed interior space;
It includes,

The cover is fastened to the basic structure by ultrasonic welding,

During the ultrasonic welding, the collar portion is partially separated from the basic structure at the same time by ultrasonic action, or the collar portion is partially separated from the basic structure following the ultrasonic welding, which is a part of the collar portion adjacent to the basic structure. The protruding outer edge remains attached to the basic structure,
The capsule includes an outer edge protruding in the lateral direction by up to 1.5 mm, and the outer edge is formed by the remaining portion of the collar portion and a corresponding portion of the cover, for one serving of the coffee machine. Method for preparing capsules. Method according to claim 1 or 2, characterized in that the basic structure is produced by thermoforming. The method of claim 1 or 2, wherein the cover has the same material composition as the basic structure. The method of claim 4, wherein the cover has the same thickness as the basic structure. According to claim 1 or claim 2, wherein the basic structure is characterized in that the sides of the basic structure is manufactured to be inclined by an inclination angle of up to 3 degrees based on a vertical line to the floor area, Method for preparing capsules. The method according to claim 1 or 2, characterized in that the basic structure and the cover are made of plastic. The method according to claim 1 or 2, characterized in that the basic structure and the cover are made of polypropylene. delete

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